Answer:
guard cells
Explanation:
they control the opening and closing of the stomata
Answer:
The kidney consists of an inner renal medulla and an outer renal cortex. Between these is a flow of Nephrons. They work together to create urine.
The energy produced from flow of water or "Hydro-power" is different to energy produced from iron, petroleum and coal as it is a clean and renewable form of energy. Hydro-power is derived from the kinetic energy of the natural flow of water like in the case of a water mill whereas the other forms listed require combustion of the fuel source that produces harmful gases leaving a negative impact on the environment. Also, hydro-power is one of the cheapest forms of energy production.
However, it should be noted that large-scale production of electrical energy from flowing water known as "Hydroelectric Power" uses man-made dams to store water in lakes as a source of potential energy. These dams can also have a negative impact on the environment as the natural flow of water is restricted. Some scientists also suggest that the construction of a dam leads to an increase in the number of earthquakes in and around the area of construction.
Answer:
No
Explanation:
Viruses have no way to control their internal environment and they do not maintain their own homeostasis
Totipotent stem cells have the ability to develop into any kind of cell found in the
human body.
When the sperm fertilizes the egg, creates the zygote which is the fist totipotent cell. After that, in the first cell divisions more totipotent cells
are produced. Within several days, these totipotent cells produce even more totipotent cells and after four days the cells begin to specialize.
